Update between date

Question

I have 12 tables for each month of the year.
I need to update a table with condition that date between in the first day of the year an the last of the year.
By example for month January I need to update the table with sys_date_time between 01/01/2006 and 31/01/2006
How I can make this?
Thanks

Answer 1

Like this ?
SQL> create table mytable_january (id number, mydate date);
Table created.
SQL> alter table mytable_january
  2  add constraint ck_january
  3  check (to_char(mydate,'MM')='01');
Table altered.
SQL> insert into mytable_january values (1, sysdate);
insert into mytable_january values (1, sysdate)
ERROR at line 1:
ORA-02290: check constraint (H89UCBAC.CK_JANUARY) violated
SQL> insert into mytable_january values (1, sysdate-30);
1 row created.
SQL> select * from mytable_january;
         1 13/01/07
SQL> Nicolas.